Method for manufacturing steel golf club head containing reactive metal

Abstract

The present invention provides a method for manufacturing a steel golf club head containing reactive metal, which can solve the problem that the conversion ratio of casting material to casting products is poor by using the conventional vacuum casting method. The method includes: locating a shell mold on a rotating platform, wherein the shell mold includes a crucible part and a mold cavity part which are communicated with each other, and the rotating platform is connected with a rotating shaft which can rotate axially; putting a steel metal ingot containing reactive metal into the crucible part of the shell mold, and heating and melting the steel metal ingot into metal liquid in vacuum environment; driving the rotating shaft to rotate the rotating platform such that the melt metal liquid flows into the mold cavity part of the shell hold; stopping the rotating shaft slowly and taking down the shell mold after casting; and breaking the shell mold to obtain a golf club head casting product.

Description

technical field [0001] The invention relates to a method for precision casting a golf club head, in particular to a method for precision casting a steel golf club head containing active metal. Background technique [0002] Generally speaking, golf clubs can be divided into three categories: woods, irons and putters. The early woods and irons were mostly made of stainless steel or carbon steel. In order to improve the functionality of the club head, in recent years There are various new steel casting materials that continue to be developed and used to manufacture golf club heads. On the other hand, golf club heads are mostly made by precision casting, and the current precision casting is mostly carried out in the atmosphere. The steel metal ingots are quickly melted with the help of a high frequency induction melting furnace (High Frequency Induction Furnace), and then combined with static Gravity cast. [0003] However, since steel-based alloys that improve the functionali...

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Problems solved by technology

[0003] However, since steel-based alloys that improve the functionality of the club head often contain active metals (such as manganese, aluminum, silicon, cobalt, titanium, etc.) that react easily with oxygen in the atmosphere, it is easy to melt steel-based metal ingots During the process, a violent oxidation reaction with oxygen will not only increase the difficulty of melting, but also easily lead to the formation of a large number of slag holes or reaction pores and other casting defects on the golf club head casting after casting; moreover, the severe oxidation The reaction will also cause the fluidity of the molten metal in the shell mold to decrease, and it is easy to reduce the molding yield of golf club head castings due to insufficient casting, or cause cold shut (Cold Shut) problems in golf club head castings. Form a gap

In addition, when the steel ingot to be smelted contains chromium, although the degree of oxidation reaction of chromium with the atmosphere during the smelting process is not as high as that of the above-mentioned active metals with higher oxidizing properties, after the molten metal containing chromium enters the mold cavity , it is easy to react with the surface layer of the shell mold to form chromium dioxide and iron oxide, which will also cause defects on the surface of golf club head castings

[0004] In order to solve the above problems, when the steel castings used to manufacture golf club heads contain active metals, the melting process is usually carried out in a vacuum environment. At present, the vacuum casting commonly used in the industry generally includes vacuum arc melting ( Vacuum Arc Melting) and induction shell melting (Induction Skull Melting); However, whether it is vacuum arc melting or induction shell melting, a water-cooled copper crucible is used as a carrier for melting steel castings during the melting process. However, the water-cooled copper crucible will reduce the superheat of the metal (Degree of Superheat), so that the molten metal will re-solidify on the inner surface of the water-cooled copper crucible, and form a shell with a thickness (the so-called "condensed shell"), so that The proportion of steel castings converted into golf club head castings is reduced, resulting in waste of castings and making it difficult to reduce casting costs. Especially when steel castings contain expensive components such as nickel or cobalt, how to improve the The conversion ratio between castings has become a subject that needs to be improved urgently

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